Sending mail from temporary email

is there any disposable email service that lets to send mail from it ? any temporary email sites that i know only let to receive mail, not to send.
Answer #1
Make account on Gmail, Yahoo etc… do whatever you need, and delete that account?!
Or you could do a bit of Googling
http://www.anonymailer.net/
Answer #2
Use Guerrilla mail..
http://www.guerrillamail.com/